Refactor pip install command in CI workflow

Updated CI workflow to handle pip installation failures.

Author: cclauss

.github/workflows/ci.yml

@@ -19,10 +19,11 @@ jobs:
         with:
           python-version: 3.x
       - run: pip install --upgrade pip
+      # TODO: Always fails even with $PYTHON_LIBRT defined!
+      # When the local pip install fails, install from PyPI
       - env:
           PYTHON_LIBRT: "amd64"  # "x64"
-        run: pip install --editable . || true  # TODO: Always fails even with $PYTHON_LIBRT defined!
-      - run: pip install lunatic-python-universal  # Workaround: Install from PyPI
+        run: pip install --editable . || pip install lunatic-python-universal
       - shell: python  # Sanity check
         run: |
           import lua